import { Component, OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';

import * as echarts from 'echarts';

declare const require: any;

@Component({
  selector: 'app-hongkong-pd',
  templateUrl: './hongkong-pd.component.html',
  styleUrls: ['./hongkong-pd.component.scss']
})
export class HongkongPdComponent implements OnInit {
  demo_html = require('!!html-loader!./hongkong-pd.component.html');
  demo_ts = require('!!raw-loader!./hongkong-pd.component.ts');

  // show loading spinner:
  mapLoaded = false;
  // empty option before geoJSON loaded:
  options = {};

  constructor(private http: HttpClient) { }

  ngOnInit() {
    // fetch map geo JSON data from server
    this.http.get('assets/data/HK.json')
      .subscribe(geoJson => {
        // hide loading:
        this.mapLoaded = true;
        // register map:
        echarts.registerMap('HK', geoJson);
        // update options:
        this.options = {
          title: {
            text: '香港18区人口密度 （2011）',
            subtext: '人口密度数据来自Wikipedia',
            sublink: 'http://zh.wikipedia.org/wiki/%E9%A6%99%E6%B8%AF%E8%A1%8C%E6%94%BF%E5%8D%80%E5%8A%83#cite_note-12'
          },
          tooltip: {
            trigger: 'item',
            formatter: '{b}<br/>{c} (p / km2)'
          },
          toolbox: {
            show: true,
            orient: 'vertical',
            left: 'right',
            top: 'center',
            feature: {
              dataView: { readOnly: false },
              restore: {},
              saveAsImage: {}
            }
          },
          visualMap: {
            min: 800,
            max: 50000,
            text: ['High', 'Low'],
            realtime: false,
            calculable: true,
            inRange: {
              color: ['lightskyblue', 'yellow', 'orangered']
            }
          },
          series: [
            {
              name: '香港18区人口密度',
              type: 'map',
              mapType: 'HK', // map type should be registered
              itemStyle: {
                normal: { label: { show: true } },
                emphasis: { label: { show: true } }
              },
              data: [
                { name: '中西区', value: 20057.34 },
                { name: '湾仔', value: 15477.48 },
                { name: '东区', value: 31686.1 },
                { name: '南区', value: 6992.6 },
                { name: '油尖旺', value: 44045.49 },
                { name: '深水埗', value: 40689.64 },
                { name: '九龙城', value: 37659.78 },
                { name: '黄大仙', value: 45180.97 },
                { name: '观塘', value: 55204.26 },
                { name: '葵青', value: 21900.9 },
                { name: '荃湾', value: 4918.26 },
                { name: '屯门', value: 5881.84 },
                { name: '元朗', value: 4178.01 },
                { name: '北区', value: 2227.92 },
                { name: '大埔', value: 2180.98 },
                { name: '沙田', value: 9172.94 },
                { name: '西贡', value: 3368 },
                { name: '离岛', value: 806.98 }
              ],
              nameMap: {
                'Central and Western': '中西区',
                'Eastern': '东区',
                'Islands': '离岛',
                'Kowloon City': '九龙城',
                'Kwai Tsing': '葵青',
                'Kwun Tong': '观塘',
                'North': '北区',
                'Sai Kung': '西贡',
                'Sha Tin': '沙田',
                'Sham Shui Po': '深水埗',
                'Southern': '南区',
                'Tai Po': '大埔',
                'Tsuen Wan': '荃湾',
                'Tuen Mun': '屯门',
                'Wan Chai': '湾仔',
                'Wong Tai Sin': '黄大仙',
                'Yau Tsim Mong': '油尖旺',
                'Yuen Long': '元朗'
              }
            }
          ]
        };
      });
  }

}